Sintering furnace back side peak temperature monitoring device and monitoring method

Abstract

The present invention relates to a sintering furnace back side peak temperature monitoring device and monitoring method, the monitoring device comprises: a heat transfer body, the interior of the heat transfer body is formed with a hollow cavity; a battery cell, the battery cell is arranged in the hollow cavity and the hollow cavity is divided into a first cavity and a second cavity; a first pressure sensor, the first pressure sensor is arranged in the first cavity; and a second pressure sensor, the second pressure sensor is arranged in the second cavity. Compared with the prior art, the present solution only needs to monitor the pressure values ​​of the first cavity and the second cavity to obtain a proportionality coefficient, and then the back side peak temperature can be calculated by a formula based on the measured front side peak temperature, thereby avoiding the problem that the temperature reader is easily damaged when the method of monitoring the front side temperature is used due to the small distance between the back side of the battery cell and the furnace belt.

Description

Technical Field

[0001] The invention relates to the technical field of crystalline silicon solar cell production, and in particular to a device and method for monitoring the peak temperature of the back side of a sintering furnace. Background Art

[0002] Photovoltaic cells are the soul of photovoltaic power generation devices and are the core components of the entire solar power generation device. Generally speaking, photovoltaic cells are assembled from glass, EVA, silicon wafers, battery cells and other components.

[0003] Sintering is the core manufacturing process of solar cells, and its functions mainly include two aspects: on the one hand, high-temperature sintering can make the silver and silicon on the front of the solar cell form a good ohmic foundation, and export the photocurrent in the PN of the solar cell, and the peak temperature of the front of the sintering furnace determines the good contact between silver and silicon; on the other hand, high-temperature sintering can make aluminum and silicon co-melt to form BSF, thereby increasing the open circuit voltage of the solar cell, and the peak temperature of the back of the sintering furnace determines the good contact between aluminum and silicon. At present, the technical means of monitoring the peak temperature of the front of the sintering furnace in the industry are very mature, such as using a thermometer to directly read the peak temperature of the front, but because the distance between the back of the solar cell and the furnace belt is very small, if the method of monitoring the front temperature is used, it is easy for the thermometer to be damaged, resulting in the industry temporarily lacking an effective means of monitoring the peak temperature of the back of the sintering furnace. Summary of the invention

[0004] Based on this, it is necessary to provide a sintering furnace back side peak temperature monitoring device and monitoring method, aiming to solve the problem that the prior art cannot effectively monitor the back side peak temperature of the sintering furnace.

[0005] On the one hand, the present application provides a sintering furnace back side peak temperature monitoring device, comprising:

[0006] A heat transfer body, wherein a hollow cavity is formed inside the heat transfer body;

[0007] A battery cell, wherein the battery cell is disposed in the hollow cavity and divides the hollow cavity into a first cavity and a second cavity;

[0008] a first pressure sensor, the first pressure sensor being disposed in the first chamber; and

[0009] A second pressure sensor is disposed in the second chamber.

[0010] When the sintering furnace back side peak temperature monitoring device using the above scheme is working, the battery cell is first loaded into the heat transfer body, and then placed in the sintering furnace together with the heat transfer body. Since the battery cell can separate the hollow cavity of the heat transfer body into a first chamber and a second chamber, and it can be understood that before the heat transfer body is placed in the sintering furnace, the pressure value in the first chamber and the second chamber is zero, as the heat transfer body goes deeper into the sintering furnace, the temperature continues to rise, and the corresponding pressure value also continues to rise. When the temperature rises to the highest, the pressure also rises to the highest. Specifically, the heat transfer body is placed in the sintering furnace, and the first pressure value P1 is obtained according to the first pressure sensor preset in the first chamber, and the second pressure value P2 is obtained according to the second pressure sensor preset in the second chamber; a proportionality coefficient K is obtained by the ratio of P2 / P1; the front furnace temperature meter is used to obtain the front peak temperature of the sintering furnace, and recorded as T1; the back peak temperature of the sintering furnace is set to T2, and according to T1 / T2=P1 / P2, T2=T1*P2 / P1=T1*K is obtained. Compared with the prior art, this solution only needs to monitor the pressure values ​​of the first chamber and the second chamber to obtain a proportionality coefficient, and then the back peak temperature can be calculated by the formula based on the measured front peak temperature, avoiding the problem of the temperature reader being easily damaged when the method of monitoring the front temperature is used due to the small distance between the back of the battery cell and the furnace belt.

[0011] The technical solution of this application is further described below:

[0012] In one embodiment, the battery cell is sealed and connected to the inner wall of the hollow cavity, so that the first chamber and the second chamber form closed spaces independent of each other.

[0013] In one embodiment, the heat transfer body includes a first heating surface and a second heating surface that are arranged opposite to each other at an interval, the first heating surface is used to be arranged opposite to a first heating component of a sintering furnace, the second heating surface is used to be arranged opposite to a second heating component of the sintering furnace, and the battery cell is arranged parallel to the first heating surface and parallel to the second heating surface.

[0014] In one of the embodiments, a sealing groove extending in a circumferential direction is formed on the side wall of the hollow cavity, and the outer periphery of the battery cell is sealed and inserted into the sealing groove.

[0015] In one embodiment, the battery cell includes a first battery split, a shaft assembly and a second battery split. The first battery split is rotatably connected to the second battery split through the shaft assembly, so that the first battery split can be set at an angle or in the same plane as the second battery split.

[0016] In one of the embodiments, the sintering furnace back side peak temperature monitoring device further includes a plurality of auxiliary clamps, wherein the plurality of auxiliary clamps are distributed in an annular direction at intervals on the interface between the first chamber and the second chamber, and the plurality of auxiliary clamps are all clamped and fixed to the battery cell.

[0017] In one embodiment, the auxiliary clamp includes a seat body, a first pin shaft, a first clip, a second pin shaft, a second clip and an elastic member, the seat body is arranged on the heat transfer body, one end of the first clip is rotatably arranged on the seat body through the first pin shaft, one end of the second clip is rotatably arranged on the seat body through the second pin shaft, and the elastic member is connected between the first clip and the second clip so that the other end of the first clip and the other end of the second clip clamp and fix the battery cell.

[0018] In one embodiment, a first clamping surface is provided at one end of the first clip away from the base, and a second clamping surface is provided at one end of the second clip away from the base. The first clamping surface is tightly attached to the first surface of the battery cell, and the second clamping surface is tightly attached to the second surface of the battery cell.

[0019] In one embodiment, the auxiliary clamp further includes a first flexible pad and a second flexible pad, wherein the first flexible pad is disposed on the first clamping surface and is in flexible contact with the battery cell, and the second flexible pad is disposed on the second clamping surface and is in flexible contact with the battery cell.

[0020] On the other hand, the present application also provides a monitoring method using the above-mentioned sintering furnace back side peak temperature monitoring device, which comprises the following steps:

[0021] dividing the hollow cavity of the heat transfer body into a first chamber and a second chamber;

[0022] Placing the heat transfer body in a sintering furnace, obtaining a first pressure value P1 according to a first pressure sensor preset in the first chamber, and obtaining a second pressure value P2 according to a second pressure sensor preset in the second chamber;

[0023] A proportionality coefficient K is obtained through the ratio of P2 / P1;

[0024] The front peak temperature of the sintering furnace is obtained by using a front furnace temperature meter and recorded as T1;

[0025] The peak temperature of the back side of the sintering furnace is set to T2. According to T1 / T2=P1 / P2, T2=T1*P2 / P1=T1*K is obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a schematic structural diagram of a sintering furnace back side peak temperature monitoring device according to an embodiment of the present invention;

[0029] Figure 2 for Figure 1 A schematic diagram of the structure of the right view angle;

[0030] Figure 3 For an embodiment of the present invention, Figure 1 Flow chart of the steps of the method for monitoring the operation of the device.

[0031] Description of reference numerals:

[0032] 100. Peak temperature monitoring device on the back of sintering furnace; 10. Heat transfer body; 11. Hollow cavity; 111. First chamber; 112. Second chamber; 12. First heating surface; 13. Second heating surface; 20. Battery cell; 30. First pressure sensor; 40. Second pressure sensor; 50. Auxiliary clamp; 51. Base; 52. First pin; 53. First clip; 54. Second pin; 55. Second clip; 56. Elastic member. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0034] like Figure 1 and Figure 2 As shown, a sintering furnace back side peak temperature monitoring device 100 is shown in an embodiment of the present application, which is used in the application occasion of measuring the back side peak temperature of the sintering furnace. Exemplarily, the sintering furnace back side peak temperature monitoring device 100 includes: a heat transfer body 10, a battery cell 20, a first pressure sensor 30 and a second pressure sensor 40.

[0035] The heat transfer body 10 can be a hollow cubic member made of copper. Copper is used because of its excellent thermal conductivity. When placed in a sintering furnace, it can be considered that the heat emitted by the sintering lamp transfers most of the heat to the heat transfer body 10, thereby simulating the heating conditions more realistically and ensuring accurate measurement results.

[0036] Furthermore, the heat transfer body 10 includes a first heating surface 12 and a second heating surface 13 that are arranged opposite to each other at an interval, the first heating surface 12 is used to be arranged opposite to a first heating component of a sintering furnace, the second heating surface 13 is used to be arranged opposite to a second heating component of the sintering furnace, and the battery cell 20 is arranged parallel to the first heating surface 12 and parallel to the second heating surface 13.

[0037] In this embodiment, the first heating surface 12 may refer to the upper surface of the heat transfer body 10, and the second heating surface 13 may refer to the lower surface of the heat transfer body 10. The first heating component and the second heating component are both sintered lamp tubes preset on the inner wall of the heat transfer body 10. The sintered lamp tubes will generate high temperature when powered on. When the heat is transferred to the heat transfer body 10, it will be further conducted to the inner cavity to heat the battery cell 20.

[0038] The battery cell 20 is arranged parallel to the first heating surface 12 and the second heating surface 13 to ensure uniform heating. The heat loss on the upper and lower surfaces of the copper body is considered to be proportional and will not affect the proportionality coefficient K.

[0039] Please continue reading Figure 1 and Figure 2 A hollow cavity 11 is formed inside the heat transfer body 10; the battery cell 20 is disposed in the hollow cavity 11, and the hollow cavity 11 is divided into a first chamber 111 and a second chamber 112; the first pressure sensor 30 is disposed in the first chamber 111; and the second pressure sensor 40 is disposed in the second chamber 112.

[0040] It can be understood that the first pressure sensor 30 and the second pressure sensor 40 are respectively electrically connected to an external control display via wired or wireless means to achieve monitoring signal transmission and display, so as to facilitate monitoring personnel to read real-time back peak temperature data.

[0041] Of course, it should be noted that in other embodiments, the heat transfer body 10 may also be made of other materials, and the heat transfer body 10 may be in other shapes such as a cylinder.

[0042] In summary, the implementation of the technical solution of this embodiment will have the following beneficial effects: when the sintering furnace back side peak temperature monitoring device 100 using the above solution is working, the battery cell 20 is first loaded into the heat transfer body 10, and then placed in the sintering furnace together with the heat transfer body 10. Since the battery cell 20 can separate the hollow cavity 11 of the heat transfer body 10 into the first chamber 111 and the second chamber 112, and it can be understood that before the heat transfer body 10 is placed in the sintering furnace, the pressure value in the first chamber 111 and the second chamber 112 is zero, as the heat transfer body 10 goes deeper into the sintering furnace, the temperature continues to rise, and the corresponding pressure value also continues to rise. When the temperature rises to the highest, the pressure also rises to the highest.

[0043] Specifically, the heat transfer body 10 is placed in the sintering furnace, and the first pressure value P1 is obtained according to the first pressure sensor 30 preset in the first chamber 111, and the second pressure value P2 is obtained according to the second pressure sensor 40 preset in the second chamber 112; a proportionality coefficient K is obtained by the ratio of P2 / P1; the front furnace temperature meter is used to obtain the front peak temperature of the sintering furnace, and recorded as T1; the back peak temperature of the sintering furnace is set to T2, and according to T1 / T2=P1 / P2, T2=T1*P2 / P1=T1*K is obtained. Compared with the prior art, the present solution only needs to monitor the pressure values ​​of the first chamber 111 and the second chamber 112 to obtain a proportionality coefficient, and then the back peak temperature can be calculated by the formula based on the measured front peak temperature, thereby avoiding the problem that the temperature reader is easily damaged when the method of monitoring the front temperature is used due to the small distance between the back of the battery cell 20 and the furnace belt.

[0044] It is necessary to explain the above measurement principle here: when the volume remains unchanged, the temperature and pressure have a specific quantitative relationship, that is, according to the formula PV=nRT, n is the molar amount of gas inside the first chamber 111 and the second chamber 112, which is a constant; R is a constant; V is a constant; so the temperature T and pressure P can be regarded as a linear function of one variable and are in a related relationship.

[0045] In some embodiments, the battery cell 20 is sealed and connected to the inner wall of the hollow cavity 11, so that the first chamber 111 and the second chamber 112 form a closed space independent of each other. In this way, the first chamber 111 and the second chamber 112 can ensure that the pressure values ​​P1 and P2 measured by the first pressure sensor 30 and the second pressure sensor 40 are not equal under the condition of being disconnected, thereby avoiding the proportional coefficient K being a fixed value and failing to meet the temperature measurement requirements under different working conditions.

[0046] In order to achieve the first chamber 111 and the second chamber 112 being independently sealed from each other, in some embodiments, the side wall of the hollow cavity 11 is provided with a sealing groove extending in a circumferential direction, and the outer periphery of the battery cell 20 is sealed and inserted into the sealing groove. In this way, the outer periphery of the battery cell 20 is inserted into the sealing groove, and can be pressed and matched with the groove wall of the sealing groove to form a bent assembly surface, which has an excellent sealing effect.

[0047] Alternatively, sealant may be injected into the sealing groove so that the sealant is bonded to the outer periphery of the battery cell 20 to eliminate assembly gaps and ensure sealing performance.

[0048] In some other embodiments, the battery cell 20 includes a first battery split, a shaft assembly and a second battery split, and the first battery split is rotatably connected to the second battery split through the shaft assembly, so that the first battery split can be set at an angle or in the same plane as the second battery split.

[0049] Since the battery cell 20 needs to be inserted into the interior of the heat transfer body 10 from the opening and then plugged into the sealing groove during installation, in order to be able to connect with the concave sealing groove, the length of the battery cell 20 is greater than the length of the hollow cavity 11. In order to avoid interference when the battery cell 20 is installed into the hollow cavity 11, the first battery split and the second battery split can be first rotated at a certain angle through the shaft assembly to facilitate installation into the hollow cavity 11; then the side of the first battery split is first inserted into the sealing groove to form a positioning, and then the shaft assembly is pressed downward, and the second battery split will gradually rotate and flatten until it is inserted into the sealing groove, thereby completing the installation of the battery cell 20 and ensuring the seal.

[0050] Optionally, the rotating shaft component may be, for example, a hinge, etc.

[0051] Please continue reading Figure 1 and Figure 2 In addition, in order to facilitate the installation and removal of the battery cell 20, in other embodiments, the sintering furnace back side peak temperature monitoring device 100 further includes a plurality of auxiliary clamps 50, which are distributed at intervals along the annular direction on the interface between the first chamber 111 and the second chamber 112, and the plurality of auxiliary clamps 50 are clamped and fixed to the battery cell 20. The auxiliary clamps 50 can also realize the rapid installation and removal of the battery cell 20, and the installation is firm and reliable, and the usability is strong.

[0052] It is understandable that when the battery cell 20 is rectangular, there are at least four auxiliary clamps 50, which are distributed in a rectangular shape. Each auxiliary clamp 50 fixes one side of the battery cell 20 to ensure that the battery cell 20 is evenly stressed and firmly installed.

[0053] Please continue reading Figure 1In some embodiments, the auxiliary clamp 50 includes a seat body 51, a first pin shaft 52, a first clip 53, a second pin shaft 54, a second clip 55 and an elastic member 56. The seat body 51 is arranged on the heat transfer body 10, one end of the first clip 53 is rotatably arranged on the seat body 51 through the first pin shaft 52, one end of the second clip 55 is rotatably arranged on the seat body 51 through the second pin shaft 54, and the elastic member 56 is connected between the first clip 53 and the second clip 55, so that the other end of the first clip 53 and the other end of the second clip 55 clamp and fix the battery cell 20.

[0054] The seat 51 is used to install and fix the auxiliary clamp 50 on the heat transfer body 10 and support the other components. The elastic member 56 is designed to be always in a stretched state, so that the elastic member 56 will pull the first clamp 53 and the second clamp 55 close to each other, thereby clamping and fixing the battery cell 20. The first pin 52 and the second pin 54 respectively install and support the first clamp 53 and the second clamp 55, while allowing the first clamp 53 and the second clamp 55 to rotate, meeting the clamping needs of battery cells 20 with different thicknesses.

[0055] Optionally, the elastic member 56 may be, but is not limited to, any one of a spring, a spring sheet, an elastic column, and the like.

[0056] Furthermore, the first clamping piece 53 is provided with a first clamping surface at one end away from the base 51, and the second clamping piece 55 is provided with a second clamping surface at one end away from the base 51. The first clamping surface is in close contact with the first surface of the battery cell 20, and the second clamping surface is in close contact with the second surface of the battery cell 20. In this embodiment, both the first clamping surface and the second clamping surface are planar structures parallel to the surface of the battery cell 20. When installed, the first clamping surface and the second clamping surface are respectively in close contact with the upper and lower surfaces of the battery cell 20, which can increase the contact area and ensure that the auxiliary clamp 50 and the battery cell 20 are clamped more firmly.

[0057] Furthermore, the auxiliary clamp 50 further includes a first flexible pad and a second flexible pad, wherein the first flexible pad is disposed on the first clamping surface and is in flexible contact with the battery cell 20, and the second flexible pad is disposed on the second clamping surface and is in flexible contact with the battery cell 20. In this way, it is possible to prevent the auxiliary clamp 50 from applying too much clamping force to the battery cell 20 and thus damaging the battery cell 20.

[0058] Optionally, the first flexible pad and the second flexible pad can be any one of a rubber pad, a foam pad, etc. The installation method can be any one of bonding, screw connection, snap connection, etc. These can be selected according to actual needs.

[0059] Please continue reading Figure 3In addition to the above, the present application also provides a monitoring method using the above-mentioned sintering furnace back side peak temperature monitoring device 100, which comprises the following steps:

[0060] S100 : dividing the hollow cavity 11 of the heat transfer body 10 into a first chamber 111 and a second chamber 112 .

[0061] S200 : placing the heat transfer body 10 in a sintering furnace, obtaining a first pressure value P1 according to a first pressure sensor 30 preset in the first chamber 111 , and obtaining a second pressure value P2 according to a second pressure sensor 40 preset in the second chamber 112 .

[0062] S300: A proportionality coefficient K is obtained through the ratio of P2 / P1;

[0063] S400: using a front furnace temperature meter to obtain a front peak temperature of the sintering furnace, and recording it as T1;

[0064] S500: Setting the peak temperature of the back side of the sintering furnace to T2, according to T1 / T2=P1 / P2, T2=T1*P2 / P1=T1*K is obtained.

[0065] The heat transfer body 10 is placed in the sintering furnace, and the first pressure value P1 is obtained according to the first pressure sensor 30 preset in the first chamber 111, and the second pressure value P2 is obtained according to the second pressure sensor 40 preset in the second chamber 112; a proportionality coefficient K is obtained by the ratio of P2 / P1; the front furnace temperature meter is used to obtain the front peak temperature of the sintering furnace, and recorded as T1; the back peak temperature of the sintering furnace is set to T2, and according to T1 / T2=P1 / P2, T2=T1*P2 / P1=T1*K is obtained. Compared with the prior art, the present solution only needs to monitor the pressure values ​​of the first chamber 111 and the second chamber 112 to obtain a proportionality coefficient, and then the back peak temperature can be calculated by the formula according to the measured front peak temperature, thereby avoiding the problem that the temperature reader is easily damaged when the method of monitoring the front temperature is used due to the small distance between the back of the battery cell 20 and the furnace belt.

[0066] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0068] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0069] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0070] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0072] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Claims

1. A sintering furnace back side peak temperature monitoring device, characterized in that: include: A heat transfer body, wherein a hollow cavity is formed inside the heat transfer body; A battery cell, wherein the battery cell is disposed in the hollow cavity and divides the hollow cavity into a first cavity and a second cavity; a first pressure sensor, wherein the first pressure sensor is disposed in the first chamber; a second pressure sensor, the second pressure sensor being disposed in the second chamber; and The heat transfer body includes a first heating surface and a second heating surface that are arranged opposite to each other at an interval, the first heating surface is used to be arranged opposite to a first heating component of a sintering furnace, the second heating surface is used to be arranged opposite to a second heating component of the sintering furnace, and the battery cell is arranged parallel to the first heating surface and parallel to the second heating surface.

2. The sintering furnace back side peak temperature monitoring device according to claim 1, characterized in that: The battery sheet is sealed and connected to the inner wall of the hollow cavity, so that the first chamber and the second chamber form closed spaces independent of each other.

3. The sintering furnace back side peak temperature monitoring device according to claim 2, characterized in that: The side wall of the hollow cavity is provided with a sealing groove extending in a circumferential direction, and the outer periphery of the battery sheet is sealed and inserted in the sealing groove.

4. The sintering furnace back side peak temperature monitoring device according to claim 3, characterized in that: The sealing groove is filled with sealant, and the sealant is bonded to the outer periphery of the battery cell.

5. The sintering furnace back side peak temperature monitoring device according to claim 4, characterized in that: The battery sheet includes a first battery split, a shaft assembly and a second battery split. The first battery split is rotatably connected to the second battery split through the shaft assembly, so that the first battery split can be arranged at an angle or in the same plane as the second battery split.

6. The sintering furnace back side peak temperature monitoring device according to claim 1, characterized in that: The sintering furnace back side peak temperature monitoring device also includes a plurality of auxiliary clamps, which are distributed at intervals along the annular direction on the interface between the first chamber and the second chamber, and are all clamped and fixed to the battery cell.

7. The sintering furnace back side peak temperature monitoring device according to claim 6, characterized in that: The auxiliary clamp includes a seat body, a first pin shaft, a first clip, a second pin shaft, a second clip and an elastic member. The seat body is arranged on the heat transfer body, one end of the first clip is rotatably arranged on the seat body through the first pin shaft, one end of the second clip is rotatably arranged on the seat body through the second pin shaft, and the elastic member is connected between the first clip and the second clip so that the other end of the first clip and the other end of the second clip clamp and fix the battery cell.

8. The sintering furnace back side peak temperature monitoring device according to claim 7, characterized in that: The first clamping piece has a first clamping surface at one end away from the base, and the second clamping piece has a second clamping surface at one end away from the base. The first clamping surface is tightly attached to the first surface of the battery cell, and the second clamping surface is tightly attached to the second surface of the battery cell.

9. The sintering furnace back side peak temperature monitoring device according to claim 8, characterized in that: The auxiliary clamp further includes a first flexible pad and a second flexible pad, wherein the first flexible pad is disposed on the first clamping surface and in flexible contact with the battery cell, and the second flexible pad is disposed on the second clamping surface and in flexible contact with the battery cell.

10. A monitoring method using the sintering furnace back side peak temperature monitoring device according to any one of claims 1 to 9, characterized in that: The steps include: dividing the hollow cavity of the heat transfer body into a first chamber and a second chamber; Placing the heat transfer body in a sintering furnace, obtaining a first pressure value P1 according to a first pressure sensor preset in the first chamber, and obtaining a second pressure value P2 according to a second pressure sensor preset in the second chamber; A proportionality coefficient K is obtained through the ratio of P2 / P1; The front peak temperature of the sintering furnace is obtained by using a front furnace temperature meter and recorded as T1; The peak temperature of the back side of the sintering furnace is set to T2. According to T1 / T2=P1 / P2, T2=T1*P2 / P1=T1*K is obtained.

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